CN214493133U - Novel structure riding wheel for excavator - Google Patents

Abstract

A novel-structure riding wheel for a digging machine relates to the technical field of digging machine riding wheels and comprises a wheel body and a wheel shaft, wherein two ends of the wheel shaft are respectively sleeved with a fixed seat, the axial surface of the wheel shaft is in clearance fit with the fixed seats, a sealing structure is arranged between the side end of each fixed seat and the wheel body, and a sealing structure is arranged between the inner wall of each fixed seat and the wheel shaft; the fixed pins which radially penetrate through the fixed seats and the wheel shafts are arranged between each fixed seat and the wheel shafts respectively, the novel-structure riding wheel for the excavator is not prone to bending and breaking of the wheel shafts, and the problems that the riding wheel is separated from the riding wheel seat and broken and the like are solved.

Description

Novel structure riding wheel for excavator

The technical field is as follows:

the utility model relates to an dig quick-witted riding wheel technical field, especially relate to a dig novel structure riding wheel for machine.

Background art:

the riding wheel is an important component in a crawler-type engineering machinery chassis, and the riding wheel, the crawler, the guide wheel, the thrust wheel, the driving wheel and the tensioning device jointly realize the walking of the whole machine. The riding wheel consists of riding wheel seat, wheel body, shaft sleeve (or bearing), sealing assembly, cover and other relevant parts. The inside of the riding wheel is provided with liquid lubricating oil, and an oil film is formed between the shaft sleeve and the shaft mainly when the wheel body rotates, so that the riding wheel plays roles in lubrication and bearing. The seal assembly mainly prevents leakage of the lubricating oil while preventing entry of foreign matter or the like from the outside. The sealing assembly generally adopts a floating oil seal, can effectively seal and isolate external dust, water and mud and protect internal lubricating oil and lubricating grease, and has the advantages of low cost, high efficiency, simple installation and positioning, long service life, capability of automatically compensating the eccentricity of a shaft and slight play of a wheel body, reliable sealing and the like. The riding wheel is divided into an optical axis structure riding wheel, a low seat structure riding wheel and a high seat structure riding wheel according to the structural form of a riding wheel seat. The supporting roller with the optical axis structure is arranged on a support on the trolley, and the support is fixed on the trolley through welding. The riding wheel with the seat is fixed on the trolley through a long bolt. The optical axis structure riding wheel and the short seat structure riding wheel are generally matched with each other to dig in a small mode, and the high seat structure riding wheel is generally matched with each other to dig in a large mode.

The stress state of the traditional riding wheel in the use process is similar to that of a cantilever beam, and the requirements on the bending resistance and the shearing resistance of a shaft are high. Meanwhile, along with the continuous bad use working conditions of the excavator, particularly mines, gravels, garbage dumps, construction sites and the like, the requirements on the shock resistance and the sealing performance of the riding wheels are continuously improved, the existing riding wheels are limited by cantilever structures, and quality problems such as bent shafts, broken shafts, oil leakage, falling-out of shafts and wheel bodies from seats and the like often occur. Meanwhile, the supporting roller seat is high in height, the fixing bolt is long, and the problems that the supporting roller seat is broken, the fixing bolt is broken and the like often occur. In order to solve the problems of shaft bending and shaft breakage in the use process, the technical means adopted is to increase the shaft diameter. Increasing the shaft diameter requires increasing the floating seal specification and changing the size of the shaft sleeve. This solution will increase the cost more on the one hand and weaken the wheel body strength on the other hand. Moreover, for the supporting roller with the optical axis structure, the connecting size of the trolley needs to be changed, so that the universality of the product is poor, and the maintenance and the aftermarket problem are not facilitated. The other improvement scheme is to select high-quality and high-strength materials to improve the hardness of the matrix. Therefore, the problem of universality caused by increasing the shaft diameter can be well solved. However, this solution also increases the cost and makes it difficult to solve the problems of oil leakage and the axle and wheel body coming off the riding wheel seat.

In order to solve the problem that the shaft and the wheel body are separated from the riding wheel seat, the interference magnitude between the shaft and the riding wheel seat is increased by adopting a commonly adopted technical means. The interference magnitude is increased, the press-fitting force in the assembling process needs to be increased, and the surface of an inner hole is easily scratched in the press-fitting process to cause sealing failure.

The utility model has the following contents:

in order to solve the technical problem, the utility model provides an it uses novel structure riding wheel to dig machine, difficult riding wheel axle bending, fracture and deviate from, riding wheel seat fracture scheduling problem, the reliability is stronger from the riding wheel seat that appears.

The utility model discloses a realize through following technical scheme:

a novel-structure riding wheel for an excavator comprises a wheel body and a wheel shaft and is characterized in that fixing seats are respectively sleeved at two ends of the wheel shaft, the axial surface of the wheel shaft is in clearance fit with the fixing seats, a sealing structure is arranged between the side end of each fixing seat and the wheel body, and a sealing structure is arranged between the inner wall of each fixing seat and the wheel shaft; and a fixing pin which radially penetrates through the fixing seat and the wheel shaft is arranged between each fixing seat and the wheel shaft.

In another aspect of the present invention, the wheel body is rotatably sleeved at the middle portion of the wheel shaft through a shaft sleeve.

In another aspect of the present invention, the side of the fixing base and the sealing structure between the wheel bodies are floating oil seals, the inner wall of the fixing base and the sealing structure between the wheel shafts are O-rings.

In another aspect of the present invention, the wheel body has a protruding limiting flange at its periphery for fitting with a track of the excavator.

The utility model has the advantages that: the riding wheel with the novel structure for the excavator is not easy to bend and break the wheel shaft, is separated from the riding wheel seat, breaks the riding wheel seat and the like, is uniform in handling during use, has high reliability, is axially positioned through the fixing pin, and is simple and reliable in structure, low in cost and good in sealing stability.

Description of the drawings:

fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic structural view of a riding wheel of a traditional excavator.

In the drawings: 1. fixed pin, 2, O type circle, 3, floating oil blanket, 4, wheel body, 5, axle sleeve, 6, shaft, 7, fixing base.

The specific implementation mode is as follows:

the following will further explain the embodiments of the present invention with reference to the drawings and examples:

in the description of the present invention, it should be understood that the description indicating the orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element indicated must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the scope of the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

A novel-structure riding wheel for an excavator comprises a wheel body 4 and a wheel shaft 6, wherein two ends of the wheel shaft 6 are respectively sleeved with a fixed seat 7, the axial surface of the wheel shaft 6 is in clearance fit with the fixed seats 7, a sealing structure is arranged between the side end of the fixed seat 7 and the wheel body, and a sealing structure is arranged between the inner wall of the fixed seat 7 and the wheel shaft 6; a fixing pin 1 which radially penetrates through the fixing seat 7 and the wheel shaft 6 is arranged between each fixing seat 7 and the wheel shaft 6. The wheel body 4 is rotatably sleeved on the middle part of the wheel shaft 6 through a shaft sleeve 5. The sealing structure between the side end of the fixed seat 7 and the wheel body is a floating oil seal 3, and the sealing structure between the inner wall of the fixed seat 7 and the wheel shaft 6 is an O-shaped ring 2. And a limiting flange matched with the excavator track is projected from the periphery of the wheel body 4.

Aiming at the problems of use requirements of the riding wheel in the walking process of the excavator, bent shaft, broken shaft, oil leakage, shaft disengagement from the fixed seat, broken fixing bolts and the like in the use process, on one hand, the cantilever type structure of the riding wheel is changed into a double-support structure, the stress state of the wheel shaft is improved, the bearing capacity and the impact resistance are improved, on the other hand, the wheel shaft and the fixed seat are axially positioned through the fixing pin, and the wheel shaft and the wheel body are prevented from disengaging from the fixed seat. The traditional riding wheel is supported on one side and is similar to a cantilever beam in a mechanical model, and the longer the riding wheel is, the higher the requirements on the bending resistance and the shearing resistance of the shaft are. Especially in working conditions such as mines, gravels, garbage dumps, construction sites and the like, the main engine has larger impact force to the riding wheel shaft and higher impact frequency, and the fatigue failure of the shaft is easily caused. Meanwhile, the traditional riding wheel floating seal structure is large in axial stress and poor in stability, and sealing failure and oil leakage are easily caused. The riding wheel in the embodiment changes single-side support into double-side support by adding the fixed seat, namely, a double-support structure. The double-support structure improves the stress state of the wheel shaft and improves the bending resistance, the shearing resistance, the impact resistance and the fatigue resistance of the wheel shaft. Meanwhile, the stress of the trolley fixing bolt is improved due to the double-support structure, and the stress of the bolt on one side can be reduced due to the fact that one side is increased to be fixed, so that the problem of bolt breakage is solved. In a word, the stability, the reliability of riding wheel have been promoted greatly to two bearing structure.

The riding wheel receives the swing of track and strikes in the use, and is interference fit between traditional riding wheel axle and the fixing base, bears the axial force through magnitude of interference, carries out the sealed between shaft and the fixing base through interference fit simultaneously. With the continuous axial impact riding wheel of track in the use, when receiving great impact force, perhaps because the shaft bending deformation that the riding wheel atress leads to arouse that interference fit between shaft and the fixing base is invalid, produce shaft and wheel body and deviate from the riding wheel seat, take place quality problems. In the riding wheel in the embodiment, a fixing pin 1 is additionally arranged between the wheel shaft and the fixing seat to bear axial stress. Meanwhile, the wheel shaft is in small clearance fit with the fixed seat, the sealing between the wheel shaft and the fixed seat is carried out through the O-shaped ring, the mounting process is simplified, the manufacturability is better, the press-fitting process is reduced, and the cost is reduced. Meanwhile, the problem that the fixing pin falls out is prevented by reducing the size of the hole at one end of the non-mounting surface, and the stability and the reliability of the riding wheel are effectively improved. The riding wheel in this embodiment adopts both ends floating seal, bears the axial force from the wheel body through the lid terminal surface, and sealing stability is better. The traditional riding wheel floating seal directly bears the axial force from the wheel body, is greatly impacted and has poor sealing performance; the shaft in this embodiment is the optical axis structure, carries out axial positioning through the fixed pin, and the structure is both simple and reliable, and the cost is lower.

In short, the above description is only a preferred embodiment of the present invention, and all the equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the scope of the present invention.

Claims (4)

1. A novel-structure riding wheel for an excavator comprises a wheel body and a wheel shaft and is characterized in that fixing seats are respectively sleeved at two ends of the wheel shaft, the axial surface of the wheel shaft is in clearance fit with the fixing seats, a sealing structure is arranged between the side end of each fixing seat and the wheel body, and a sealing structure is arranged between the inner wall of each fixing seat and the wheel shaft; and a fixing pin which radially penetrates through the fixing seat and the wheel shaft is arranged between each fixing seat and the wheel shaft.

2. The riding wheel with the novel structure for the excavator as claimed in claim 1, wherein the wheel body is rotatably sleeved on the middle part of the wheel shaft through a shaft sleeve.

3. The novel structure riding wheel for the excavator as claimed in claim 1 or 2, wherein the sealing structure between the side end of the fixing seat and the wheel body is a floating oil seal, and the sealing structure between the inner wall of the fixing seat and the wheel shaft is an O-shaped ring.

4. The riding wheel with the novel structure for the excavator as claimed in claim 1, wherein a limiting flange matched with an excavator crawler belt is protruded on the periphery of the wheel body.

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